下列物质的用途中,主要利用其化学性质的是( ) A.活性炭做去味剂 B.干冰用作制冷剂 C.焦炭用于炼铁 D.石墨制铅笔芯 答案:C根据中文意思完成句子。 1. 邮局离这儿有些远,你最好坐车去。 The post office is a bit far from here. _______________ take a bus. 2. 为什么不早点儿把这个好消息告诉他呢? _______________ tell him the good news a little earlier. 3. 王芳还没来,她怎么了? Wang Fang hasn't come yet. _______________ her? 4. 很多医护人员太忙了,顾不上吃饭。 Many doctors and nurses are _______________ have their meals.5. 战士们已连续工作了18个小时,有必要让他们停下来休息。 The soldiers have kept working for 18 hours, so _______________.